Islam, S. M. N., S. H. Rahman, D. A. Chowdhury, M. M. Rahman, and S. M. Tareq. “Seasonal Variations of Arsenic in the Ganges and Brahmaputra River, Bangladesh”. Journal of Scientific Research, vol. 4, no. 1, Dec. 2011, p. 65, doi:10.3329/jsr.v4i1.7820.